Knotter-hook for binders.



V. R. HANSON.

KNDTTER HOOK FOR BINDERS. APPLlcAUoN rlLl-:n JAN. s. 191s.

1,176,216. l ,Patented Mar'. 21, 1916.

rrnn sinY rement ernten.

VICTOR `IR.. HANSON, OFJVIINNEAPOLIS, MIN.`L\TIE1SO'].`J1f

KNOTTER-I-IOOK FOR BINDERS.

Application filed January 6, 1915.

To all whom t may concern:

Be it known that I, VICTOR R. HANsoN, a citizen of the United States,residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented certain new and useful Improvements in Knetter-Hooks for Binders; and I do herebydeclare the following to be afull,clear, and exact descriptionof the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

invention has for its Vobject to improve the invention consists of thenovel construction and combination of parts hereinafter described anddefined in the claims.

More `specifically stated, my invention has for its-object to provide animproved knotter hook which is automatically adjustable and universallyadaptable for use fto tie knots in binding. twine` of greatly varyingdiameter and quality, orl in other words,

which will operate eiiiciently to tie knotsinV very small twine,'or invery large twine, or inthose cheap grades of loosely made twine whichvary at different lineal points both in diameter and compactness.

The above objects are accomplished by the provision of ayieldingsecondary jaw, set into a slot in the bifurcate'd foot portionof the hook and arranged for coperation with the primarvcam-actuated jawof the hook.

The invention also involves certain other highly important features, aswill hereinafter appear.' InY the accompanying drawings which illustratethe invention, likefcharacters indicate like parts throughout theseveral views. Referring tothe drawings: Figure 1 is a view in sideelevation showing the improved knetter hook complete and showing alsopor-f tions of one of the bearings' and the cams for actuating theprimary jawk of the hook;

Fig. 2 is a side elevation of the hook looking j at the opposite Asidefrom that shownin Fig. 1; Fig. 3 is a view correspondingV to Fig. 2, butwith certain parts sectioned and some partsnbroken away; Fig. 4 is arear elevation of the complete knetter hook; and Fig. 5 1s a detail insection taken on the line m5 m5 on Fig. 2.

The knetter hook'l, except as hereinafter noted, is of theusual form,and it is either formed as an integral part of, or otherwiseSpecification of LettersPatent.

Patented Mar. 21, 1916. Serial No. 775.

rigidly secured to the customary shaft 2, which, in practice, will berotated inV the usual way. The lower end portion of the shaft 2 isjournaled in a bearing 3 which has the usual cam surfaces 4 and 5 foroperating the knetter' jaw, which, in this instance, is the primary jawof the hook.

In accordance with my invention, the foot andbody portion of the hook 1are bifurated to afford seats for a pair of coperating twine clampingjaws G and 7 that are intermediately pivoted to the said hook,respectively, by pins 8 and 9. The jaw 6 corresponds in a general way tothe usual knotter jaw and is provided at one end with the customaryanti-friction roller 10 that is subject to the cam surfaces 4 and 5,under rotation of the knotter hook` In this improved knotter hook, thejaw 6 is treated as the primary jaw and the jaw 7 as the secondary jaw.These two jaws are provided with cooperating serrated surfaces Ga and7a, respectively, which, when the jaws are forced to-V gether, interlapin such manner that they will grip the smallest kind of twine. Thesecondary jaw 7, at that end which is under the roller-equipped end ofthe primary jaw 6, is subject to a coiled compression spring 11 that isset into a suitable seat 12 formed in the body ofthe hook 1. The saidseat 12 is laterally offset from the plane of the jaws 6 and 7 and thesecondary jaw 7 is provided with a laterally offset lug 13 against whichthe said spring 11 re-acts, with a force tending to hold the saidsecondary jaw in the .normalpositicn indicated in the several views ofthe drawings. It is important to note (see particularly Figs. 3 and),that the bifurcated foot portions of the hook 1 are made concave-convex,so that they form a sort of a channel above .the bottom of which theserrated edge of the secondary jaw 7 projects upward. In fact, theserrated edge 7a of the said jaw 7, preferably, projects normallyslightly above' the upturned outer edge flanges ofthe bifurcated footportion of the said hook 1. It will also he ncted that the extreme endof the primary hook 6 is increased in depth or formed with a sort of alug that overlaps with the outer end of the secondary hook 7. e

Under rotation of the knotter hook, when the roller 10.is forced againstthe cam surl:the said channel.

in Fig. V1, and when the saidroller 1,0 is.`

mary hook will be k,forced downward `to its extreme position indicatedin Figs 2 and 8. lVhen the above noted movement of the primary hooktakes place with no twine in the hook, the serrated surfaces GLP-'andiaof the said hooks 6 and 7, are simply forced into engagement, but littleor no movement will be given to the secondary hook. When, however, theYsaid. movement of the primary hook 'takes :place 1while twine isbetweenthe two jaws, the said secondary hook will be depressed a distancedepending on the diameter of the interposed twine. AThe tension of thespringll must be such thatthe twine gripping engagement of the hooks 6and 7, therewith, will securely i hold the twine against slipping, whilethe knot is being tied. The channel-,shaped form of the bifurcatedportion of the ,hook permits the serrated end of the secondary jaw 7 toVbe depressed at various distances without'bringing the twinejtightlyagainst .the .bottom of At the Sametime, when the jaw ,7` isdepressed toany considerahle extent, the twine will be kinked over the edge flangesof the foot o'f the hook and the twine-holdingaction thereby increased.

".By referring to Fig. 1,'it will be noted, that when Vthe primary jawf6 is raised 4to its extreme position, Vits `roller-equipped` endengages 'the underlying end of the secondary jaw 7 so thatiit thusserves to Vpositively insure return movement of the said secondary jawto its normal position after each depression, and prevents the saidsecondary jaw from being wedged, by portions of lthe twine or position.

Itl is 'therefore evident that this improved knotter hook willautomatically adapt itself to different kinds, grades and sizes oftwine.

It should be further noted that the offset lug 130i' the secondary'jaw'?worksin a recessie formed in the body of the hook l and that theengagement'of lthislug with the walls of itwill tie knots in ordinarywrapping twine, f

lsaid recess limits the extreme movements of said secondary jaw. Also,it shouldfr be Y noted that the .primary jaw (iis provided at itsroller-equipped end' with a stop shoulder 15 that engages with lthelower end of the shaft 2, to "limit the eXtreme downward movement of theserrated end of the said primary jaw. Furthermore, the concave convex'lor channel-shaped cross sections of the bifurcated footy portion of thehook, afford channels into which the cut ends of the twine maybe forcedto facilitate the slipping of the tied knot off .the hook.

In actual practice, it has been found that in Vveryflarge cheap gradesofirregularly and Vloosely formed binding twine, and also,

shank audrigidlv connected ,footgirre-V portions of 'straw in adepressed of cou rse, in the variousintermediate gradesv andsizes. Theknot tied by'this knetter is,

:as will be'understood, that tied by various l, A -knotter hookcomprising .a .shank I and a footprojecting laterally from one fendthereof, two co'ipei'ating ljawsfpivoted.to said foot for-movementstoward ,and fromV each other, and inrespect .tosaid footfand meansformoving one of theknot tying action.

tliesaid aws inK Y Y 2 2. A rotary fknotterihok Vcomprisng ,at

jectin'g laterally `'frein .one ,end thereof, 4a:- pairY of` cooperatingjaws gpifvfted ito said f0.0t for `I novements toward land: from ,eachother :and in, respect to said foot, yielding means normally holdingVone tof. said jaws i use' in a. ,predetermined position in l.respect tosaid foot, and means for'movingthegother jaw. toward said yielding`jawunder trotation ofsaid knotterhookf` V f f 3. A. knotter hookYcomprising -a shankA having at one .end a laterally projecting footy apositively operated primary Ejaw.pivoted to said foot, and a,coiperating yieldiugly held secondary jaw also pivotedzto said'foot, Y

the twine engaging portion vvof 'said .seconde aryl jaw beingnormallvVabove 'the cord;l

engaging face lof the saidffoot, and adapted tombe depressed-variabledistances 4toautomatically adapt the knotter t0icordloi'fdieiir` ferentsize. Y y Y n 4. A knotter'hook comprisinga shankY having at .one endVaf laterally.projecting hifurcated foot port-ion, the said; bifurcatedfootporltion ,being yconeavofconyex .in cross .Y section, and primaryand secondaryftwine clamping jaws 4pilvotally connected the hlfurcatedportion of the 4body ofsaid hookf,

the said secondary jaw'being yieldllglyheld:` i

in normal positiom and the ;saidfprimary Jaw being capable ,offpredetermined 4norme? ments in the knot-.tying action.

5. A rotary "knotter'hook comprising a fizt shank and a foot rigidlysecured to oneend Vj of said shank and projecting laterally` there-v Yfrom, the projecting portion of .said'foot .bee ing bifurcated andthefsaid;bifurcateel ,portion having a channel-shaped cross section,primary and secondary j-awspivotedto .sind foot, the ylatter. beinerlocated inthe bifurca-V tion of `Said foot, 'a Spring yieldngly isa Ying said secondary jaw with its upper free end portion above the bottomof the channel of said foot, and meanslfor positively moving saidprimary jaw toward said secondary jaw in the knot-tying action.

6. A knotter hook comprising a shank having at one end a laterallyprojecting foot, coperating primary and secondary twine clamping jawspivoted to said foot, the form-er of which jaws, at one end, is equippedwith a rollerand provided with a stop shoulder for. limitingone movementthereof, and the latter of which jaws is provided with an offset lugworking in a recess in the body of said hook, and a spring set into thebody of said hook and compressed In testimony whereof I affix mysignature i in presence of two witnesses.

VICTOR R. HANSON. Witnesses:

HARRY D. KILGORE, F. D. lVIrRCHANT.4

Copies of' this patent may be obtained for ve cents each, by addressingthe "Commissioner of Patents, Washington, D.`G.

